Common Core Standard 8.G.9
The surface area of a cone is the outside covering of the cone. Finding the surface area of a cone involves finding the lateral area and adding this to the base area of the cone.
What is a cone in geometry?
A cone is a three-dimensional geometric shape. The base of a cone is circular in shape.
A cone has only one vertex.
Two common types of cones are the right cone and the oblique cone
A right cone has its apex positioned over the cones center of the base.
The apex of a oblique cone is not positioned over the center of the cone’s base
In summary… To find the surface area of a cone follow these steps.
- Find the lateral area of a cone using:
- πradius x slant height of the cone
- Find the base area of the cone using:
- πradius squared
- Add the Lateral area plus the base area
